Dev Tools · 2h ago
50 lines of code fix LangGraph's unreliable LLM routing
LangGraph's routing relies on LLM prompts, causing inconsistent tool selection. A developer created a deterministic router using YAML rules and 50 lines of Python. The approach eliminates guesswork by matching inputs to predefined domains with keywords and regex.
Meridian48 take
While clever, this workaround highlights a deeper issue: LLM-based orchestration tools still struggle with reliability, and deterministic fallbacks may become a necessary pattern.
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LangGraph's Routing Is LLM-Guessing. I Wrote 50 Lines of Code to Make It Deterministic. →
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